<!doctype html>
<html>

<head>
	<title>Line Chart Multiple Axes</title>
	<script src="../../../dist/chart.min.js"></script>
	<script src="../../utils.js"></script>
	<style>
	canvas {
		-moz-user-select: none;
		-webkit-user-select: none;
		-ms-user-select: none;
	}
	</style>
</head>

<body>
	<div style="width:75%;">
		<canvas id="canvas"></canvas>
	</div>
	<button id="randomizeData">Randomize Data</button>
	<script>
		var lineChartData = {
			labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
			datasets: [{
				label: 'My First dataset',
				borderColor: window.chartColors.red,
				backgroundColor: window.chartColors.red,
				fill: false,
				data: [
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor()
				],
				yAxisID: 'y',
			}, {
				label: 'My Second dataset',
				borderColor: window.chartColors.blue,
				backgroundColor: window.chartColors.blue,
				fill: false,
				data: [
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor(),
					randomScalingFactor()
				],
				yAxisID: 'y1'
			}]
		};

		window.onload = function() {
			var ctx = document.getElementById('canvas').getContext('2d');
			window.myLine = new Chart(ctx, {
				type: 'line',
				data: lineChartData,
				options: {
					responsive: true,
					interaction: {
						mode: 'index'
					},
					stacked: false,
					plugins: {
						title: {
							display: true,
							text: 'Chart.js Line Chart - Multi Axis'
						}
					},
					scales: {
						y: {
							type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
							display: true,
							position: 'left',
						},
						y1: {
							type: 'linear', // only linear but allow scale type registration. This allows extensions to exist solely for log scale for instance
							display: true,
							position: 'right',

							// grid line settings
							gridLines: {
								drawOnChartArea: false, // only want the grid lines for one axis to show up
							},
						},
					}
				}
			});
		};

		document.getElementById('randomizeData').addEventListener('click', function() {
			lineChartData.datasets.forEach(function(dataset) {
				dataset.data = dataset.data.map(function() {
					return randomScalingFactor();
				});
			});

			window.myLine.update();
		});
	</script>
</body>

</html>
